Mining machine



NOW-6, 1934. M P HOLMES 1,979,266

MINING MACHINE Original Filed July 6. 1922 8 Sheets-Sheet l M. P. HOLMESMINING MACHINE:

Nov. 6, 1934.

Original Filed July 6. 1922 8 Sheets-Sheet 2 Q @m QN M. P. HQLMES Nov.6, 1934.

MINING MACHINE 8 Sheets-Sheet 3 Original Filed July 6. 1922 MININGMACHINE Original Filed July 6. 1922 8 SheeJcS-Shee'I 4 Nov. 6, 1934.

M. P. HOLMES MINING MACHINE original Filed July 6. 1922 8 sheets-sheet 5772 ffy M. P. HOLMES MINING MACHINE Nov. 6, 1934.

8 Sheets-Sheet 6 Original Filed July 6. 1922 IE5/g. 14.

"limits of the machine.

Patented Nov. 6, 1934 l UNITED STA MINING MACHINE Morris P. Holmes,Claremont, N. H., assignor to Sullivan Machinery Company, a corporationof Massachusetts Application July 6, 1922, Serial No. 573,149 RenewedNovember 29, 1930 152 claims. (c1. sez- 28) My invention relates tomining machines.

An object of my invention is to provide an improved mining machine.Another object of my invention is to provide an improved mining machinehaving improved propulsion mechanism. A further object of my inventionis to provide an improved mining machine having mechanism. A stillfurther object of my invention is to provide an improved mining machinehaving cutting mechanism mounted in an improved manner whereby the samemay be adjusted to insert a kerf in practically any plane in advance ofthe machinewithin the operating Other objects and advantages of myinvention will hereinafter more fully appear.

In the accompanying drawings I have shown for purposes of illustrationone form which my invention may `assume in practice.

In these drawings,-

Fig. 1 is a side elevation of a mining machine 'constructed inaccordance with the illustrative form of my invention, the bar beingpartially broken away and shown in undercutting position.

Fig. 2 is a plan view or such a machine.

Fig. 3 is a sectional View, partially in elevation, on the brokensection line 3--3 of Fig. 4, the bar being shown in shearing position.

Fig. 3a is a detail `View showing a portion of the control mechanism. Y

, Fig. 4 is a vertical section, partially in elevation, on the brokensection line 4-4 of Fig. 3, the bar being shown in shearing position.

Fig. 4a is a detail showing an interlock for the controls.

Fig. 5 is a horizontal section on the line 5-5 of Fig. 4. v

Fig. 6 is a vertical section on the section line 6--6 of Fig. 3.

Fig. 7 is a vertical section on the section line 7 7 of Fig. 4;

Fig. 8 is a detail showing locking mechanism.

Fig. 9 is a section on the broken line 9-9 of Fig. 8.

Fig. 10 is a View, partially in elevation and partially in section on anenlarged scale, of truck frame tilting means of an improved constructionemployed in the illustrative form of my invention.

Fig. 11 is a vertical section on the broken section line 11-11 of Fig.10.

Fig.V 12 vis a vertical section on the line 12-12 of Fig. 2.

improved adjusting means for the cutting Fig. 13 is a vertical sectionon the section line 13-13 of Figs. 1 and 4.

Fig. 14 is a vertical section on the section line 14-14 of Fig. 2.

Fig. 15 is a diagrammatic View showing va- 60 lrious positions in whichthe cutter bar may be disposed.

Figs. 16, 17, 18, 19, 20 and 21 are various simplified views showingdifferent cuts by the machine.

Referring first to Figures l and 2, the apparatus as a whole comprises atruck consisting of a truck body 1 mounted on wheels 2 and adapted torun upon a track 3 upon which truck is mounted a mining mechanismgenerally designated M, and including a motor casing 4, a gear housing5, a cutter `bar 6 and supporting `and adjusting mechanism for thecutter bar generally designated 7, which mechanism I shall hereaftermore fully describe. d For the purpose of permitting a moderate angularadjustment of the mining machine M as a Whole about a transversehorizontal axis, there is provided the following mechanism: Secured toangle irons 8 forming the upper lateral portions of the truck body 1 arecircular members 9 bolted as at 10 to the members 8 and forming pivotsabout which the mining machine is tiltable. It will be noted that thesemembers are located about midway between the axles of the truck. Themachine frame is provided at its opposite sides with projecting bearingmembers 12 bolted as at 13 to the sides of the macasing 5, which membersl2 have curved bear- 0 ing surfaces 14 which pivotally support themining machine as a whole upon the members 9. It will also be observedthat the members 12 are arranged about at the center of mass of thetilting machine frame, and accordingly that no great amount of force isnecessary to enable the tilting of the machine about its pivot. For thepurpose of effecting this tilting, there is disposed upon the truckframe 1, in suitable journals 15, a transverse rock shaft 16 to which atopposite sides of the center thereof but closely adjacent to each otherthere are secured a pair of similar arms 17 which are connected at theirfree ends by a bolt 18 upon which there are rotatably mounted in asuitable manner rollers 19. These rollers are arranged in guideways 20which are secured to the bottom of the machine lM itself. It will beobserved from Fig. 10 that when the machine frame is in a hori- 1 Zontalposition, the arms 17 are not vertical and so that upon swinging of theshaft 16 and resultant swinging of the arms 17, the rollers 19 travelingwithin the slots 20 will cause a tilting movement of the machine frameas a whole. This tilting may be in either direction about the transversepivot. In order to lock the shaft 16, an arm 21` is secured' by keyingor any other suitable manner to one end thereof and with this arm therecooperates arm` swingingmeans comprising an arm engaging member 22,

which is threaded throughout a considerable portion of its length asindicated at 23, supported in suitable horizontal guides 24 and movedlongitudinally upon rotation `of the nut 25 engaging the threadedportion 23, which nut may be rotated upon the member 23 by a handoperated. ratchet and pawl mechanism 26. It

will be observed that, depending upon the di- Within the motor casing 4,there is arranged a motor (not shown) supplied with current through ausual reeling device 4 described in a previously filed application, themotor herein being reversible and provided with suitable controlling andreversing mechanism of any suitable or usual construction. The motorcomprises an armature shaft which projects through opposite ends of themotor casing 4 and operates to supply power for the driving of thecutting mechanism, the shifting thereof, and the feeding movements ofthe machinev as a whole both during cutting and in running around themine. The rear end of the armature shaft which is designated 31 carriesthereon a spur pinion 32 which meshes with a spur gear 33 keyed orotherwise suitably secured to a horizontal longitudinally extendingshaft 34 upon which a worm 35 is arranged. The worm meshes with a wormwheel 36 mounted upon a transverse hollow shaft 37 and by means of asuitable friction control 38, which is of a well known construction, adriving sprocket 39 whose position is shown in Figs. l and 2 may bereversibly driven, depending upon the direction of rotation of the shaft30; or at the will of an operator upon suitable manipulation of thefriction mechanism 38 be permitted to rotate when disconnected from theshaft 37. vAt its opposite end, the armature shaft 30 is extended, aslater described, and carries near the motor casing 4 a spur pinion 40which meshes with and drives a spur gear 4l arranged upon a horizontallongitudinally disposed shaft 42, supported in suitable bearings 43within the gear housingy 5. At its forward end, the shaft 42 carries abevel pinion 44 which is disposed between and drives a pair` of bevelgears 46 and 47. The latter are connectable by friction clutchmechanisms of a well known form, and which are generally designated 48and 49, alternately with a transverse horizontal shaft 50. A suit- `ableshipper mechanism 5l carried by ahollow `horizontal transverse sleeve 52is normally held in neutral position by oppositely acting springs 53arranged between adjustable collars 54 and `the frame of the miningmachine.

collars 55 engaging the ends of the sleeve 52. Within the sleeve 52 is ashaft 56 having shoulders 57 adapted to engage the collars 55 and tofree the sleeve of the influence of one or the other of the springs 53.The shaft 56 is movable by the coaction of a rack 58 and gear segment 59in a manner to effect control of the clutches 48 and 49 and so thealternate connection or the complete disconnection of the gears 46 and47 from the shaft 50. The segment 59- is controlled by a hand lever 60upon the top ofthe gear housing 5, which lever has a neutral and twooperating positions in which it may be llocked by any suitable means. Itwill be observed that the loading of the friction clutches is by thesprings 53 and these may be adjusted to cause slipping of the frictionsat any desired load, so as to prevent overloading the motor. The shaft50 is provided with a worm 61 which meshes with a worm wheel 6l upon acollar 62 which is keyed to ahorizontal longitudinally extending shaft63 arranged below and to one side of the shaft 42. It will therefore beobvious that reverse rotation of the shaft 63 is effected by reverserotation of the bearings 64and 65 formed in the gear casing 5 and theshaft carries adjacent the former of these bearings and to the rear ofthe worm wheel 61', a worm 67 which meshes with and `drives a worm wheel68 rotatably mounted on` a transverse horizontal shaft 69 journaled asat 76 in the gear; casing 5. The shaft 69 has keyed thereto a sleeve 7lupon which spur teeth 72 are formed. A similar spur gear 73 isoperatively connected to the worm gear 68 and a sliding clutch sleeve 74movable by a shipper 75 is adapted to connect the pinion`72 with thepinion 73 for simultaneous rotation, and so driving of the shaft 69 maybe effected. The shaft 69 has a portion 76 Vprojecting through the sidewall of the gear casing 5 and carries keyed thereon a driving sprocket77. The clutch shipper 75 is arranged upon a shaft 78 which projectsthrough thetop of the gear casing and is operable by a handle 79 whichmay be locked in its operating positions by any suitable means.

77' and 39 are to be found. Thel forward axle 89 has secured thereto asprocket wheel 83, and a chain 84, cooperating with the sprockets 82 and83, connects the axles for simultaneous rotation in theY same direction.A driving chain 85 passes,y as best shown by dotted chain lines j shaft50. The shaft 63 is supported in suitable i in Fig. l, around thesprockets 39 rand 77 and around the sprocket 81 upon the rear axle 80,it being also observed from Fig. l that the chain passes -around afurther sprocket 86 which, as

vbest shown in Fig. 12, is adjustable in position to vary the tensionofthe chain. The adjusting mechanism for the sprocket 86 is as follows:The sprocket 86 is mounted upon a shouldered sleeve 87 which cooperateswith a circular member 88 having a flange 39 in clampa stationarycircular seat 90 carried upon A stud 91 is threaded into the member 88and a nut 92 is adapted to connect rigidly a chain guard 93, the member37, the members 88 and 90 in ing such `manner as `to hold the sprocketin any desired position. As' 'it will be noted that the portion ofv themember 87 about which the sprocket `96 is rotatable is not concentricwith the portion of the member 87 which is rotatable in the journal onthe main frame,Y it will be evident that the member 87 may so move as toprovide more slack or to tighten the chain 85 and then securely hold itin desired position. A similarly adjustable sprocket 94 is arrangedbetween the truck wheels 2 and serves both as a means for additionalchain tightening and to keep the chain olf the track.

Having described thus far the mechanism which is used for eifectingtranslational movements of the machine, 1 will describe its operation.It will be evident that during running around the mine it is immaterialso far as this i operation is concerned whether the cutter chain runs atall or what direction it runs in, although it is preferable that it doesnot run at all, as is thecase herein. It is accordingly possible toreverse the motor and so to reverse the direction of rotation of thearmature shaft without in any way interfering with the operation of themechanism. Accordingly, the friction clutch mechanism 38 will suffice tocontrol the connection of the rear end of the armature shaft 31 by wayof the pinion 32, gear 33, worm 35,

. worm wheel 36, and shaft 37 with the driving sprocket 39 and so effectthe running of the machine at a relatively high rate of speed about themine. When it is desired to cut and feed the'machine during cutting, itis obvious that unless the cutter bits are to be shifted the motor mustrun in one direction. Accordingly, it must be possible, if sumping andwithdrawing cuts are to be used, to reverse the direction of movement ofthe machine without reversing the motor. For this reason 1 have providedthe reversible driving mechanism including the clutches 48 and 49, etc.and so am able to reverse the direction of rotation of the drivingsprocket 77 at will while maintaining the direction of rotation of thearmature shaft 30 unchanged. Let it be assumed that it is desired toeffect bodily movement of the machine in one direction, then to maintainit stationary, and then to move it bodily in the opposite direction.Under these circumstances, whichever one of the friction clutches 48 or49 as should be operated to effect the proper drive of the sprocket 77for forward feed will be engaged. Thereupon the shaft 50 will rotate thewor 61, the latter will drive the worm wheel 61', the shaft 63, the worm67 and the worm wheel 68, and, if the clutch member 74 is in properposition to connect the gears 72 and 73, the shaft 69 will be rotatedand so the sprocket 77 will be rotated to effect forward feed. 1t

A will be evident, by reason of the presence of the several worms andother reducing elements in this train, that the speed during cuttingwill be much less than that during running around the mine, and it willbe obvious that during the rotation of the sprocket 77 by power, thefriction clutch 38 will be so operated as to allow the idle rotation ofthe sprocket 39. When the machine has been fed in a forward direction asfar as desired, the handle will be swung in such way as to causedisconnection of both the friction clutches 48 and 49 and the machinewill be then locked in its position upon the track as the worms willprevent rotation of the truck axles. All that is necessary to effectretraction of the machine is to throw in the other of the clutch members48 and 49 and the machine will then be retracted in the desired manner.During running around the mine, it will be evident that by placing theclutch shipper 51 in mid-position, the mechanism for driving the shaft69 may be rendered inoperative, but it will be necessary on account ofthe presence of the worms to throw the clutch member 74 to a position todisconnect the spur teeth 'l2 and 73, and then the shaft 69 and sprocket77 will be rotated idly during the movement of the machine about themine.

It will be observed that the armature shaft 30 at its forward endextends completely across the full length of the gear housing 5 and isjournaled in the front end of that housing in a bearing member 95 inwhich suitable antifriction bearing means 95' are arranged. The extremeforward end of the shaft 30 carries suitably keyed, or otherwise heldthereon, a spur driving pinion 96 whose connections with other portionsof the mechanism will be hereinafter described. The front end of thegear casing 5 herein also terminates in a flange 100 to which there issecured by bolts 101 a collar member 102 having an inwardly directed rim103 at the forward side thereof. The rim 103 constitutes retaining meansfor an annular internal gear member 104 which is journaled in the member1.02 and to a flange 105 on which there is bolted as at 106 a member 107which may be referred to as a neck or turret member. The member 107 hasan annular recess 108 formed therein overlying the flange or rim 103.The member 107 at a point spaced longitudinally of the machine from theportion thereof which is bolted to the internal gear 104 and ineccentric relation to the latter is provided with a circumferential rimor flange 109 to which an internal gear member 110 is bolted as at 111.This internal gear member partially overlies an annular groove 112 inthe flange 109 and thereby serves to lock in position a sleevelikemember 113 which has a rim or flange 114 inwardly directed and disposedin the recess 112. To the member 113 is bolted as at 115 a second turretmember 116 which supports the cutter mechanism and forms a casing forthe bar swinging and cutter chain driving mechanism. It will be observedthat the turret member 107 is rotatable upon rotation of the internalgear 104 about a longitudinally extending horizontal aXis whichcoincides with the axis of the armature shaft 30, while it will beobserved from Fig. 3 that the turret member 116, while rotatable about ahorizontal axis, is not rotatable about an axis coincident with the axisof the armature shaft 30, but about a parallel axis oifset therefrom amaterial distance.

Extending midway between the sides of the turret member 116 andjournaled in suitable bearings 117 is a shaft 118 about whose axis theturret member 116 is rotatable. The shaft 118 carries suitably securedto the rear end thereof a spur gear 119 which is constantly in mesh withthe spur gear 96 and which is driven thereby. At its forward end theshaft 118 carries a beveled pinion 120. This pinion meshes with abeveled gear 121 which is secured to a sleeve 122 within which a shaftmember 123 is arranged, this shaft member being provided between itsends with a spur gear 124 and at its top having fixed thereto in anysuitable manner a cutter chain driving sprocket 125. The shaft ber 127secured to 123 at its lower end is journaled in a suitable bearing 126lwhich is supported in a plate memvthe lower side ofthe sleeve 122. Themember 127 is journaled in turn in a bearing 128 suitably supported in aweb 129 forming a portion of the turret 116. Arranged coaXially with theshaft 123 is a beveled driving pinion 130 which is held in constantdriving relationship with the `gear 121 by an interlock--` ingconnection 131 through the intermediation of the sleeve 122 and platemember 127.

Upon one side of the turret member 116 there is arranged what might betermed a third turret member 135 to which the cutter bar 136 carryingthe cutter chain 136' is secured by bolts 137. lThe turret member 135 isbolted as at 138 to a large internal gear 139 which is journaled in asleeve-like flange member 140 bolted as at 141 to the front of theturret member 116 and provided with an inwardly directed flange 142 tohold the internal gear member 139 in place. It will be observed that theturret member 135 is traversed by an opening 143 in which suitableroller bearings or other antifriction means 144 are interposed betweenthe member 135 and the shaft 123. The turret castings 116 have a flange146 which supports the gear 139 at the side opposite the flange on themember 140. At this point, it may be noted that in the form of myinvention shown herein the turret member 116 is made in two lateralhalves for purposes of convenience of casting or assembly, but thisparticular type of construction is obviously not essential.

Disposed on opposite sides of the driving pinion 130 are a pair of bevelgears 150 and 151 which may be connected by suitable friction clutchmechanisms 150 and 151 of any well known type, herein of the multipledisc type, in driving relation with members 152 and 153 secured to ashaft 154 extending across the turret 116 perpendicularly to thedirection of the shaft 123. The controlling mechanism for these clutchesis identical in principle and mode of operation with that for theclutches 48 and 49, the similar parts being designated by primednumbers. The shaft 154 is journaled at its opposite ends in suitableanti-friction bearings 155 carried on the turret member 116 and haskeyed to it adjacent the opposite ends thereof, a pair' of worms 156 and157. These worms mesh respectively with worm wheels 158 and 159. Thelatter are rotatable on axes parallel to the axis of the shaft 123. Theaxes of rotation of the gears 158 and 159 lie in a vertical planetransverse to the longitudinal axis of the armature shaft. As in theirgeneral construction the mountings for the gears 158 and 159 aresimilar, with the exception of the fact that the gear 159 has additionalconnections not present in the case of the gear 158, it will besuiiicient todescribe the arrangement of the gear 159. This gear isjournaled in a bearing 160 in the side of the turret 116 opposite thecutter bar, the gear beingY secured in any suitable way, (herein boltedon) to the hollow shaft 161 which is journaled in the bearing 160. Atits upper end the hollow shaft 161 is connected to a sleeve 162 whoseperiphery is provided with gear teeth 163 upon which is slidable atoothed clutch member 164.

Coaxial with the sleeve 161 is a shaft 165 which the shaft 1,65 isprovided with a toothed portion 168 which may be connected with theteeth 163 bythe clutch element 164. It will thus be evident that byproperly vshifting the clutch member 164, the worm wheel 159 may beconnected with the gear 168. It will be observed thatthe teeth'of, themember 168 are relatively long and this constructionis employed in viewof the fact that the member 168 is in constant mesh with a gear 170keyed to a hollow shaft 171 and journaled in anti-friction bearings 172on an axis parallelto the Vaxes of rotation of the worm wheels 158 and159 and herein equi-distant from said axes. The connection for andmounting of the wheel 158 is substantially identical with the details ofthe mounting for the wheel 159 as so far described and by operating aclutch member corresponding to the clutch member 164 the wheel 158 maybe caused to drive the gear 170.

In order-that the gear 170 may not be simultaneously connected with thewheels 158 and 159, I employ the following mechanism for shifting theclutch members 164. Extending transversely across the front end of theturret 116 is a shaft 173, which shaft is journaled for rotation Aon anaxis parallel to the plane which includes .the axes of rotation of thewheels 158 and 159. Arranged coaxial with the shaft 173 are a pair ofsleeve members 174 and 175, which sleeve members carry at their adjacentends mutilated pinions 176 and 177 respectively, which pinions mesh withshort racks 178 and 179, these racks being pivotally connected to rockerlarms 180 and 181 which carry the shipper forks 182 and 183 for shiftingthe clutch members 164 and are pivoted on the turret 116. For thepurpose of operating the sleeves 174 and 175, I have provided suitablemechanism which will prevent the engagement of one of the clutchmechanisms except at a time when the other is out. This mechanism isinterchangeable from one side to the other of the turret for conveniencein handling the machine and includes a pairof handles 184 and 185. Thehandle 184 may be connected directly to either end of the shaft 173,while the handlev 185 may be connectedV directly to either of thesleeves 174 or For the. purpose of connecting the shaft 173 with theother of the sleeves, I employ a member 186 which is adapted to besecured to either end of the shaft 173 and which nts over and may beconnected by a suitable spline, or in any other manner, to the sleeve174 or 175 to which the handle 185 is not then connected. It will thusbe evident that the twohandles may be placed at the same side of theturret and yet operate both of the clutches as desired. For the purposeof preventing the engagement of Vone clutch when the other is engaged,or in fact in any position except full disengagement, I arrange a plate188 between the handles 184 and 185 and can secure this plate by screws189 at either side of the turret depending upon the positions of thehandles. The plate is rtraversed by an opening 190 through which thereis slidably arranged a round or cone-ended locking pin 191. These pinreceiving sockets are respectively numbered, for the handles 184 and185, 194 and 195. "The length of the pin 191 is such that, when one endof the same is received the shaft 208 where the latter projects throughoccupies, the handle containing that socket cannot be turned, it beingunderstood that the handles are provided with abutment surfaces adjacentthe sockets to prevent the movement of the pin out of the socket inwhich it may be lodged except at the time when the other socket comesopposite the pin. From this description, it will be gathered that thesockets are so placed in the handles 184 and 185 that, when both socketsare in clutch disconnecting position, the sockets 194 and 195 come overthe pin 191. Accordingly, as soon as either c-f the handles is moved,the pin 191 is forced into one of the sockets in such manner as to lockthat lever which has not been moved `and until the lever which has beenmoved is returned to initial or off position the other lever is heldagainst movement.

The worms 156 and 157 are of materially different pitch, the purpose ofthis being to provide forl different rates of swing of the cutter bar.The shaft 171 upon which the gear 170 is keyed is provided at its upperend with a driving pinion 200, which pinion meshes with the internalgear 189. As a result, it will be observed that the turret may be turnedto swing the cutter bar about the axis of the shaft 123 by rotation ofthe gear and, since the gear 170 is arranged to be rotated in oppositedirections and at different speeds by the connections previouslydescribed, it will be understood that the bar may be swung in oppositedirections and at different speeds at the will of the operator. Theswing of the bar that is accomplished by the drive from the worm 157'isemployed for positioning the bar prior to cutting, while the worm 156 isused to swing the bar during the making of a swinging cut. No means isneeded to lock the bar during the time when it is not to be swung as, solong as either of the clutches 164 is in clutch engaging position, therecan be no movement of the bar on account of the presence of the worms inthe drive connections for the gear 200.

Now returning for a moment to the description of the mechanism driven bythe worm gear 159 and noting Fig. 7, it will be seen that between themembers 161 and 162 there is secured the supporting flange of a bevelgear 201. This bevel gear is accordingly rotated whenever the worm wheel159 is rotated. The gear 201 meshes with another bevel gear 202 securedto a hollow shaft 203 journaled upon an axis parallel to the axis of theshaft 118 in the turret 116. This hollow shaft at its rear end carries aspur pinion clutch element 204. Coaxial with the shaft 203 and journaledat one end within the bore of that shaft is a shaft 205, which shaft isprovided near one end with spur teeth 206 corresponding to the spurteeth 204 and connectable with the latter by a shiftable clutch element207 which may be moved by a rocker shaft 208 and clutch shipper lever209 engaging the groove 210 in the periphery of the member 207,therevbeing a suitable operating handle 211 arranged upon the end of thewall of the turret casing 116. Upon the opposite end of the shaft 205there is a pinion 212 which meshes as indicated in Fig. 4 with theinternal gear 110. It will therefore be clear that if desired, byconnecting the elements 204 and 206 by means of the element 207 and bythe drivit will be possible to cause rotation of the turret 116 aboutthe axis of the shaft 118 since, the internal gear 110 being secured tothe inner periphery of the front end of the turret member 107, theturret member 116 will be rotated as the shaft 205 travels in a circlearound the axis of the shaft 118. To prevent rotation of the turret 107about the axis of the shaft 30 except at desired times, I employ asuitable locking means best shown in Figs. 8 and 9 comprising a numberof rack teeth 213 mounted upon an arm 214 and swinging about a shaft 215which projects through the wall of the gear casing 5 in such manner asto be accessible for the attachment thereto of an operating lever 217.This operating lever may be fixed in locking or unlocking position bythe aid of suitable gear teeth 219 and latch 220. Similar locking meansis employed in conjunction with gear 110, the parts controlling lockingof the turret 116 being similarly controllable, the diiference beingthat in the first case the gear is held stationary by the locking means,while in the other the gear is already stationary and the turret 116 isthe part held.

Formed upon the shaft 63 forwardly of the bearing 65 is a spur clutchelement 221 which is connectable with a similar clutch element 222secured to a shaft 223 which is journaled at one end within the shaft 63and at its opposite end in the front plate of the gear housing 5 as at224. The shaft 223 has formed upon it a pinion 225 which meshes with theinternal gear 104. A

suitable clutch element or sleeve 226 is arranged to interconnect theclutch elements 221 and 222 and may be shifted by the shipper element227 controlled by a handle 228 at the top of the gear housing 5, thehandle 228 serving to rotate the 1.,',

shaft 229 which swings the shipper element 227 and is locked in itsoperative position by any suitable means. It will be evident thatdepending upon the direction of rotation of the reversible rotatableshaft 63 the turret 102 may be turned in opposite directions, while thesame may be prevented from turning during cutting feed of the machine bysimply disconnecting the clutch elements 221 and 222.

The possibility of disconnecting the shaft 123 from the sleeve 122 forthe purpose of interrupting chain drive is obvious from what has gonebefore. For the purpose of accomplishing this, a sleeve 230 is slidablydisposed adjacent the top of the sleeve 122 and by means of teeth 231secured to the sleeve 122, upon suitable shifting of the element 230upwardly, the teeth 124 and the teeth 231 may be connected to causedriving of the cutter chain driving sprocket 125 while, by downwardmovement of the sleeve or clutch element 230, drive of the cutter chaindriving sprocket 125 may be interrupted. The member 230 is provided inits periphery with an annular groove 236 with which a shipper element237 cooperates. This element is moved by a lever 238 keyed on the shaft239, the lever 238 being one arm of a bell crank 240. The other arm 241of the bell crank is slotted as at 242 and an eccentric pin 243 mountedupon a transverse shaft 244 projecting through the side isn ., taindetails of operation give, let the axis of rotation of the armature axisof the shaft 118 be designated B. then the axis about which the turret116 turns.

, nated D and shown Fig. 15. The cutter bar which by the cutter bar indifferent tions being indicated by the circles E, F, G and 116 is bodilyrotated about the axis of the armature shaft, the cutter bar may bemaintained in any given plane it happens to be in at the beginning ofsuch bodily rotation, for the gearing which rotates the turret 116 onthe axis of the shaft 118 is so proportioned that the turret 116 willrotate on its own axis at such a rate as to keep the plane of the barconstantly parallel to a given plane. This phenomenon is accomplished bysimultaneously releasing both turrets 107 and 116. It will be understoodthat it is not necessary to accomplish this result for, by employing thedrive for the gear 225 while the drive for the gear 212 is interrupted,there will be no turning of the turret 216 about the axis of the shaft118, and if the gear 212 is driven while the gear 225 is not driven,there will be no bodily rotation of the turret 116, although the samewill rotate about the axis of the shaft 118.

Figure l5 is presented for the purpose of showing the diferentpossibilities of cut with my improved mining machine. For the purpose ofmore readily considering this figure and cer- Which I shall now A willthen be the 116 is bodily rotat- 107 turns. Let the B is shaft 30 bedesignated A. axis about which the turret able and in which the turretLet the axis of the shaft 123 be designated C. C is the axis about whichthe cutter bar swings. Now observing Figure 15, it will be noted that Y,the axis A is, except for tilting slightly above and below a horizontalposition, ixed save for longitudinal movement in the direction of bodilymovement of the entire machine. The axis B is rotatable about the axis Ain the path desigin a dot-and-dash line in is oiTset from the axis B maybe caused to assume any position around the axis B irrespective of theposition of the axis B, the several paths passed through illustrativeposi- H. Dependent upon the relative amount of offset between the axes Aand B and the distance of the cutter bar from the axis B, it will bepossible to obtain varying results in the limits in which the machinemay cut. If the distance between the central plane of the cutter bar andthe axis B is equal to or less than the distance between the axes A andB, conceived of as extended in parallelism with each other, it will bepossible for the cutter bar to be brought into a plane which coincideswith its plane'and which passes through the axis A. If the distancebetween the axis B and the plane of the bar is A greater than thedistance between the axis B and the axis A, the cutter bar can neverassume a position in the plane which A. If a cutter chain of suflicientwidth of cut is employed, it will be evident from the outer series ofbar positions indicated at I1, I2, Ia, that they may be made to cut in acomplete cylindrical path. The positions of the bar shown at J and J2demonstrate the possibility of moving the bar into positions in the sameplane with the bar supporting elements in different relative positions.

To make plain the mode of operation of this mechanism its operation as awhole will be concisely explained. On entering the mine, the machinewill run to the room in which work is to be done under power transmittedto the truck includes the axis Leva'zc wheels 2 from the armature shaft'30 by Way of the pinion 32, gear 33, worm 35, wheels 36, drivingsprocket 39 and the sprocket chain 85. When the machine reaches theplace where a cut is to be made, the bar may be adjusted into anydesired plane by effecting rotation about one or both of the axes A andB, as may be found necessary. The bar may be swung about the axis C bythe fast swinging means described as a preliminary to a sumping cut. Theentire machine may be fed into the coal by means of the truck driveeffected by driving sprocket 77. When the cut has been made to thedesired depth, rotation of the driving sprocket 77 may be discontinuedand the machine will be locked in position owing to the worms in thesprocket drive. The mechanism for swinging the bar may then be employedto swing the bar during the making of a transverse cut, at this time theslow swinging feed previously described being employed. When the bar hasmade its swinging cut by reversing the drive of the sprocket 77, themachine may be backed out of the coal, completing the cut during theretraction. The parts may be then operated to bring the longitudinalaxis of the cutter bar into parallelism with the longitudinal axis ofthe machine and the bar brought down to a position near the track wherethe equilibrium will be more stable. The machine may then be run 01T toa new place Where work is to be done. For longwall cutting all that isnecessary to do Longwall cuts as well as shortwall cuts may be made atany height and further may be made at any angle within a very widerange. If it is desired to make an undercut, or a top out at a slightangle, this can be accomplished by providing the bar with a slightinitial downward or upward tilt by tilting the entire machine around thetransverse axis extended by the journal members 9. It will be equallyclear that when desired any variety of shearing, either adjacent thecenter of the room or entry, or adjacent the side wall, withinreasonable made with my impossibilities, but there are obviously otherswhich will suggest themselves to those skilled in the art.

While I have in this application specically described one form which myinvention may departing .from its spirit or the scope of the appendedclaims.

What I claim as new Letters Patent is:

and desire to secure by 1. In a mining machine, a portable frame, n

cutting means thereon including a motor mounted on said frame, and meansdriven from the opposite ends of said motor shaft for respectivelyeffecting feed of said frame as a whole during cutting and feed duringrunning around a ning gear alternatively driven by opposite ends of saidmotor.

3. In a mining machine, Va portable frame, cutting mechanism mountedthereon, a motor mounted on said frame having a power shaft and adaptedto actuate said cutting mechanism, and selfcontained means driven fromthe opposite ends of said power shaft for effecting translation of saidframe at different predetermined speeds while said motor speed remainssubstantially constant.

4. In a mining machine, a portable frame, cutting mechanism mountedthereon,.a motor mounted on said frame having a power shaft and adaptedto actuate said cutting mechanism, and means driven from the oppositeends of said motor shaft for respectively effecting feed of` said frameduring cutting and feed during running around a mine.

5. In a mining machine, a portable frame, cutting mechanism mountedthereon, a motor mounted on said frame having a power shaft extendinglongitudinally of said frame and adapted to actuate said cuttingmechanism, and means driven from the opposite ends of said power shaftfor effecting translation of said frame at different speeds includingclutch means for rendering said feeds alternately operative.

6. In a mining machine, a portable frame, cutting mechanism mountedthereon, a motor mounted on said frame having a power shaft extendinglongitudinally of said frame and adapted to actuate said cuttingmechanism, and means driven from the opopsite ends of said motor shaftfor respectively effecting feed during cutting and feed during runningaround a mine.

7. In a mining machine, running gear, a reversible motor mounted on saidrunning gear, and means alternatively driven by opposite ends foreffecting drive of said driven by one end of gearing for effecting gearwithout rerunning gear, said means said motor shaft including reversedrive of the running versal of the motor.

8. In a mining machine, running gear, a reversible motor mounted on saidrunning gear, and means alternatively driven by opposite ends of themotor shaft for effecting drive of said running gear, said means drivenby one end of said motor shaft including means :for effecting reversedrive of the running gear without reversal of the motor and each of saidmeans being frictionally controlled.

9. In a mining machine, running gear includv-ing a rotatable propellingmember engaging the surface over which said machine moves, a motorsupported on said running gear, and driving means therefor including asingle driving element rotatable coaxially with said propelling memberalternatively driven by opposite ends of the motor to effect drive ofsaid member, said driving means being frictionally controlled duringeither drive.

10. In a mining machine, running gear, a mo- -tor supported on saidrunning gear, and means including a single driving connection with saidrunning gear and alternatively operative clutches for driving saidrunning gear in either direction by either end of the motor shaft.

11. In a mining machine, running gear, a re-l versible motor supportedon said running gear, and means including a single driving connection tosaid running gear alternatively. driven in either direction by eitherend of the motor shaft for actuating saidrunning gear,` said meansincluding mechanism whereby said running gear may be driven in oppositedirections by one end of said motor shaft without reversal of the motor,and said mechanism being included only in the connections between oneend of said motor and said single driving connection.

12. In a mining machine, running gear, a reversible motor supported onsaid running gear, and means including a single driving connectiontosaid running gear alternatively driven in either direction by either endof the motor shaft for actuating said running gear, said means includingmechanism whereby said running gear may be driven in opposite directionsby one end, but only one end, of said motor shaft without reversal ofthe motor, and said mechanism being included only in the connectionsbetween one end of said motor and said single driving connection.

13. In a mining machine, running gear, a motor mounted on said runninggear, said running gear including a shaft on which a driving member ismounted, and means for driving said driving member including separatedriving elements each constantly operatively connected with said drivingmember and respectively adapted to be driven in either direction byopposite ends of the motor shaft.

14. In a mining machine, a truck frame, means for effecting translationthereof including a truck wheel, a rotatable driving member for saidtruck wheel, a plurality of rotatable elements constantly connected forrotation with said rotatable driving member and adapted selectively toconstitute driving members for the latter, driving means for saidrotatable elements, and mechanism between said driving means and saidelements operative to connect them in driven relation to said drivingmeans or to permit free rotation thereof.

15. In a mining machine, a truck frame, means for effecting translationthereof including a truck wheel, a driving sprocket connected with saidwheel in driving relation, a chain passing around said sprocket, a pairof driving sprockets operatively engaging with said chain, and meanswhereby either of said last mentioned sprockets ny be driven by power orpermitted to rotate 1 y.

16. In a mining machine, a truck frame, means for effecting translationthereof including a truck wheel, a driving sprocket connected with saidwheel in driving relation, a chain passing around said sprocket, a pairof driving sprockets operatively engaging with said chain, and meanswhereby either of said last mentioned sprockets may be driven in eitherdirection by power or permitted to rotate idly.

17. In a mining machine, a truck frame, means for effecting translationthereof including a truck wheel, a driving sprocket connected with saidwheel in driving relation, a chain passing around said sprocket, a pairof driving sprockets operatively engaging with said chain, and meanswhereby either of said last mentioned sprockets may be driven atdifferent rotative speeds by power or permitted to rotate idly.

18. In a mining machine, a truck frame, means for effecting translationthereof including a truck wheel, a driving sprocket connected with saidwheel in driving relation, a chain passing varound said sprocket, a pairof driving sprockets operatively engaging with said chain, and meanswhereby either of said last mentioned sprockets may be driven atdifferent speeds in either direction by power or permitted to rotateidly.

19. In a mining machine, a truck frame, means for effecting translationthereof` including a truck wheel, a driving sprocket connected with saidwheel in driving relation, a chain passing around said sprocket, a pairof driving sprockets operatively engaging with said chain, and meansincluding a single motor disposed on said truck frame whereby either ofsaid last mentioned sprockets may be driven by power or permitted torotate idly.

20. In a mining machine, a truck frame, means for effecting translationthereof including av truck wheel, a driving sprocket connected with saidwheel in driving relation, a chain passing around said sprocket, a pairof driving sprockets operatively engaging with said chain, and meansincluding a single motor disposed on said truck frame whereby either ofsaid last mentioned sprockets may be driven by power or permitted torotate idly, said last mentioned means including means for rotating oneof said last mentioned sprockets in opposite directions while said motorrotates in the same direction.

121. In a mining machine, a truck and driving means therefor including amember having rotary motion only relative to said truck and operative onrotation to eifect movement of translation of the truck, a plurality oftoothed members constantly operatively connected through theirperipheries with said first mentioned member, a motor, and means forconnecting said motor selectively to either of said last mentionedmembers.

` 22. In a mining machine, a truck and driving means therefor includinga member oper` ative on rotation to eect movement of translation of thetruclna plurality of members con-- stantly operatively connected withsaid rst mentioned member and adapted alternatively to act as drivingmeans therefor, a motor, and means for connecting said motor alternately-to either of said last mentioned members, said last mentioned meansincluding mechanism operative to drive one of said members in oppositedirections without reversal of the motor.

23. In a mining machine, a truck and driving means therefor including amember operative on rotation to effect movement of translation of thetruck, a plurality of members rotatable on parallel axes and constantlyoperatively connected with said first mentioned member, a reversiblemotor, and means for connecting said motor selectively to either of saidlastmentioned members.

24. In a mining machine, a truck and driving means therefor including amember operative on rotation to eiect translation of the truck, aplurality of members rotatable on parallel axes and continuouslyconnected in operative relation to said rst mentioned member, a motorcarried on said truck, and means including a reversing gearing and motorreversing means for effecting the driving in opposite directions of saidfirst mentioned member.

25. In a mining machine, the combination with a cutter bar and drivingmotor therefor, of means for swinging said cutter bar in oppositedirections at different speeds by power including a rotatable member towhich said bar is connected, and means including parallel shaftsperpendicular to the plane of swing of said bar selectively operable todrive said rotatable member to effect bar swing.

"26. In' a' mining machine', the combination with a cutter bar and adriving motor therefor, of means for swinging said cutter bar inopposite directions at different speeds by power from said motorincluding a rotatable member by which said bar is carried, a drivingmember for said rotatable member rotating on an axis parallel to theaxis of the latter, and driving means for said driving member includinga plurality of driving trains each of which includes a shaft driven bysaid motor, said shafts being parallel to each other and to a planeincluding the axis of said driving motor.

27. In a mining machine, the combination with a cutter bar and a drivingmotor therefor, of means for swinging said cutter bar in oppositedirections at dierent speeds by power including a rotatable member towhich said bar is connected, and means including parallel shaftsrotating at different speeds operatively connectible in driving relationwith said rotatable member to swing said bar at different speeds.

28. In a mining machine, the combination with a cutter bar and a drivingmotor therefor, of means for swinging said cutter bar in oppositedirections at different speeds by power from said motor including arotatable member by which said bar is carried, a driving member for saidrotatable member rotating on an axis parallel to the axis of the latter,and a pair of shafts driven by said motor at different speeds anddisposed parallel to said axis of rotation and operatively connectiblewith said driving member.

29. In a mining machine, the combination with a cutter bar and a drivingmotor therefor, of means for swinging said cutter bar in oppositedirections at different speeds by power from said motor including arotatable member by which said bar is carried, a' driving member forsaid rotatable member rotating on an axis parallel to the axis of thelatter, a pair of shafts driven by said motor at different speeds anddisposed parallel to said axis of rotation and operatively connectiblewith said driving member, and means manually operable to effect suchconnection alternately but not simultaneously.

30. In a mining machine, the combination with a cutter bar and a drivingmotor therefor, of means for swinging said cutter bar in oppositedirections at different speeds by power from said motor including arotatable member by which said bar is carried, a driving member for saidrotatable member rotating on an axis parallel to the axis of the latter,a pair of shafts driven by said motoi at different speeds and disposedparallel to said axis of rotation and operatively connectible with saiddriving member, and means manually operable to effect such connectionalternately but not simultaneously, said means being provided withoperating elements adapted to be arranged ateither side of said cutterbar. l

3l. In a mining machine, the combination with a cutter bar and a drivingmotor therefor, of means for supporting and positioning said bar to'cutin various planes parallel to a horizontal axis and for swinging saidbar during cutting including a turret rotatable on a horizontal axis andmeans carried by said turret including a rotatable member to which saidbar is connected and means including parallel shafts rotating atdifferent speeds each operatively connectible in driving relation withsaid rotatable member.

32. In a mining machine, the combination with a cutter bar and a drivingmotor therefor,

of means for supporting and positioning said bar to cut in variousplanes parallel to a horizontal axis and for swinging said bar duringcutting including a turret rotatable on a horizontal axis and meanscarried by said turret including a rotatable member by which said bar iscarried, a driving member for said rotatable member rotating on an axisparallel to the axis of the lai'- ter, and a pair of shafts driven bysaid motor and disposed parallel to said axis of rotation and eachoperatively connectible with said driving member.

33. In a mining machine, the combination with a cutter bar and a drivingmotor therefor, of means for supporting and positioning said bar to cutin various planes parallel to a horizontal, axis and for swinging saidbar during cutting including a turret rotatable on a horizontal axis andmeans carried by said turret including a rotatable member by which saidbar is carried, a driving member for said rotatable member r0- tating onan axis parallel to the axis of the latter, a pair of shafts driven bysaid motor and disposed parallel to said axis of rotation and eachoperatively connectible with said driving member, and means manuallyoperable to effect suoli connection alternately but not simultaneously.

' 34. In a mining machine, the combination with a cutter bar and adriving motor therefor, of means for supporting and positioning said barto cut in various planes parallel to a horizontal axis and for swingingsaid bar during cutting including a turret rotatable on a horizontalaxis and means carried by said turret including a rotatable member bywhich said bar is carried, a

driving member for said rotatable member rotating on an axis parallel tothe axis of the latter, a pair of shafts driven by said motor anddisposed parallel to said axis oi' rotation and each operativelyconnectible with said driving member, and means manually operable toeffect such connection alternately but not simultaneously, said meansbeing provided with operating elements adapted to be arranged at eitherside of said cutter bar.

35. In a mining machine, the combination with a machine frame, a pivotedcutter, and a driving motor therefor, of means for supporting saidcutter on said frame permitting angular adjustment thereof about an axisextending longitudinally of said frame, said cutter being adapted to cutin planes parallel to the axis of said adjustment and being adjustableby power from said motor towards and from said axis and beingautomatically at different rates in opposite directions about its pivot.

36. In a mining machine, the combination with a cutter and a drivingmotor therefor, of means for supporting the cutter including a turretrotatable about a substantially horizontal axis, said cutter beingdisposable successively in parallel planes differently spaced from saidaxis and swingable by said motor in opposite directions in any of saidplanes at different speeds while said motor speed remains constant, andmotor operated devices for effecting disposit-ion of said cutter bartoward and from said axis into said parallel planes at a bar positioningspeed.

37. In a mining machine, the combination with a pivoted cutter and adriving motor therefor, of means for supporting the cutter including aturret rotatable about a substantially horizontal and a second turretrotatable about a parallel axis carried by said rst mentioned turret andspaced from the axis of the latter, and means for effecting oppositeangular rotation of said turrets about their respective axes at equalangular rates.

38. In a mining machine, a machine frame, a swinging cutter bar, andmeans for adjustably supporting and moving said bar on said frameincluding a turret rotatable on a horizontal axis, a second turretrotatable on a parallel horizontal axis offset from said first mentionedhorizontal axis, and means for effecting rotation of said iirstmentioned turret including an internal gear carried thereby and adriving gear rotatable on a shaft parallel to but offset from the axisof rotation of said turret.

39. In a mining machine, a machine frame, a swinging ci ter bar, andmeans for adjustably support ig' and moving said bar on said frameincluding a turret rotatable on a horizontal axis, a second turretrotatable on a parallel horizontal axis, and means for eifcctingrotation of said second mentioned turret including an internal gearcarried by said first mentioned turret and a driving gear rotatable onan axis offset from the axis of rotation of said second mentioned turretiut parallel thereto, said gear being carried by the second mentionedturret.

40. In a mining machine, a machine frame, a swinging cutter bar, andmeans for adjusting said "par and supporting the same on said frameincluding` a plurality of turrets rotatable on parallel horizontal axes,and a plurality of turret rotating shafts offset from but parallel tosaid axes.

fil. In a mining machine, a machine frame, a swinging cutter bar, andmeans ior adjusting said bar and supporting the same on said frameincluding a plurality of turrets rotatable on parallel horizontal axes,and a plurality of turret rotating shafts offset from but parallel tosaid axes, the shaft for rotating one oi said turrets being carried onsaid frame and the shaft for rotating the other turret being carried bythe latter.

42. In a mining machine, a machine frame, a swinging cutter bar, andmeans .for adjustable supporting and moving said bar on said frameincluding a turret pivoted on a horizontal axis on said frame, a turretpivoted on a parallel horizontal axis on said first mentioned turret,means for eifecting rotation of said turrets on said axes including ashaft rotatable on an axis parallel to said horizontal axis and carriedby said frame, and a second shaft carried on said second mentionedturret and parallel to said first mentioned shaft.

43. In a mining machine, a machine frame, a pivoted cutter bar supportedthereon for swinging in different angularly related planes, a motor onsaid frame, and means for swinging said bar by power from said motorincluding bar swinging mechanism and a friction clutch between elementsof said mechanism having automatically limited loading means, saidloading means including a spring normally tending to load said clutch.

4:4. In a mining machine, a machine frame, a pivoted cutter barsupported thereon, a motor on said frame, and means for swinging saidbar by power rfrom said motor including bar swinging mechanism betweencertain of whose elements a friction clutch is arranged, said clutchhaving a spring normally tending to load the same and manual means forpermitting said spring so to operate without applying additional forcethereto.

45. In a mining machine, transmission mechanism, a friction clutch, ashipper therefor movable to load the same, a spring tending to move saidshipper to load said clutch, means normally preventing said spring frommoving said shipper to load said clutch, and manually movable meansoperable to permit said spring to cause loading of said clutch withoutapplying additional force thereto.

46. In a mining machine, transmission mechanism, a friction clutchoperable when loaded to cause driving of said transmission mechanism inone direction, a friction clutch operable when loaded to cause drivingof said transmission mechanism in the other direction, a shipperintermediate said clutches, a pair of springs tending tormove saidshipper in opposite directions, and manual means for rendering one ofsaid springs inoperative to permit the other to cause loading of one ofsaid frictions, said last'mentioned spring acting expansively against afixed abutment to eect loading.

47. In a mining machine, transmission mechanism, a friction clutchoperable when loaded to cause driving of said transmission mechanism inone direction, a friction clutch operable when loaded to cause drivingof said transmission mechanism in the other direction., a shipperintermediate said clutches, a pair of springs tending to move saidshipper in opposite directions, manual means for rendering one of saidsprings inoperative to permit the other to cause loading of one of saidfrictions, said last mentioned spring acting expansively against a lixedabutment to eifec't loading and means for varying the compression ofsaid springs.

48. In a mining apparatus, a wheel mounted truck, a mining machine onsaid truck, a chain 'drive for said truck including a chain loopoperatively connected with at least one truck wheel, and a plurality ofdriving sprockets projecting laterally from said machine and engagingwith said loop.

49. In a mining apparatus, a wheel mounted truck, a mining machine onsaid truck, a chain drive for said truck including a chain loopoperatively connected with at least one truck wheel,

a plurality of driving sprockets projecting laterj ally from saidmachine and engaging with said loop, and means for tightening orloosening said chain.

50. In a mining apparatus, a wheel mounted truck, a mining machine onsaid truck, a chain drive for said truck including a chain loopoperatively connected with at least one truck wheel, a plurality ofdriving sprockets projecting laterally from machine and engaging withsaid loop, and means for tightening or loosening said chain including anidler having an eccentric journal on its mounting.

5l. In a mining apparatus, a truck, a mining machine thereon, saidmining machine comprising a body and a plane pivoted cutter baradjustable bodily about a pairof parallel pivots 'extendinglongitudinally of said body and also mounted for swinging movement inits own plane, and means for tilting said body on said truck to givesaid bar an upward or downward Y gj inclination. 'ic

52. In a mining apparatus, a machine frame, a turret rotatable about ahorizontal axis supported on said frame, a cutter bai' pivoted betweenits ends and mounted on said turret and swingable about an axisperpendicular to said horizontal axis, and means for swinging said bariii-opposite directions about its pivot including a pair of membersrotatable on axes perpendicular to the axis of swing of said bar andrespectively at opposite sides of such axis.

53. In a mining apparatus, a machine frame, a turret rotatable about ahorizontal axis supported on said frame, a pivoted cutter bar mounted onsaid turret and swingable about an axis perpendicular to said horizontalaxis, means for swinging said bar in opposite directions including apair of members rotatable on axes perpendicular to the axis of swing ofsaid bar and respectively at opposite sides of such axis, and a pair ofmembers rotatable on axes parallel to such axis.

54. In a mining apparatus, a machine frame, a turret rotatable about ahorizontal axis supported on said frame, a pivotedk cutter bar mountedon said turret and swingable about an axis perpendicular to saidhorizontal axis, means for swinging said bar in opposite directionsincluding a pair of members rotatable on axes perpendicular to the axisof swing of said bar and respectively at opposite sides of such axis, apair of members rotatable on axes parallel to such axis, and a memberoperative on rotation to directly effect swing of said bar, said lastmentioned member being alternately connectible with said last precedingpair of members.

55. In a mining apparatus, a truck frame, a mining machine pivotallysupported on said truck, and means for tilting said machine upon saidframe and holding it without manual intervention in different adjustedpositions including a horizontal shaft parallel to the axis of tiltingand mounted on said frame, lever means secured to said shaft engagingthe mining machine and connected thereto, and lever means on said shaftfor turning the same.

' 56. In a mining apparatus, a truck frame, a mining machine pivotallysupported on said truck, and means for tilting said machine upon saidframe and holding it without manual intervention in a plurality oftilted positions including a horizontal shaft parallel to the axis oftilting and mounted on said frame, lever means secured to said shaftengaging and mining machine and connected thereto, and parallel levermeans on said shaft for turning the same.

57. In a mining apparatus, a truck frame, a mining machine pivotallysupported on said truck, and means for tilting said machine upon saidframe and holding it without manual intervention in a plurality oftilted positions inv eluding a horizontal shaft parallel to the axis oftilting and mounted on said frame, lever means secured to said shaft,means in fixed relation to said mining machine providing a slot in whichthe extremity of said lever means moves,

ing the mining machine, lever means on saidv shaft for turning the same,rand means carried on said machine for applying force to said lastmentioned lever means.

59. In a mining apparatus, a truck frame, a mining machiney pivotallysupported on said truck, and means for tilting said machine uponculating cutter chain member operatively connected to cutting devices, amotor said mechanism relative save for pivotal said frame including ahorizontal shaft parallel to the axis of tilting mounted on said frame,lever means secured to said shaft engaging the mining machine, a leveron said shaft for turning the same, and means carried on said machinefor applying force to said lever, said last mentioned means comprising ascrew operatively connected to said lever and a manually rotat'- ablenut carried by said machine.

in a mining apparatus, a truck fra-me, a mining machine pivotallysupported on said truck, and means for tilting said machine upon saidframe including a horizontal shaft parallel to the axis of tiltingmounted on said frame, lever means secured to said shaft engaging themining machine, a lever on said shaft for turning the same, and meanscarried on said machine for applying force to said lever, said lastmentioned means comprising a screw operatively connected to said lever,a manually rotatable nut carried by said machine and ratchet mechanismfor rotating said nut.

Gl. ln a mining apparatus, a machine frame, motor thereon, a pivotedcutter bar, a cirthereen, means for supporting said bar for bodilyadjustment on said trame including a plurality of horizontallongitudinally pivoted turret elements, and means operable by said motorto selectively turn either or both of said turret elements or swing saidbar, and to drive said chain or leave it idle.

62. ln a mining apparatus, a truck frame,

mechanism including cutting devices and actuating therefor adjustablymounted on said truck frame, and means for effecting adjustment of saidmechanism relative to said truck frame including an actuating membermovable longitudinally of said frame, a pivoted member fixed save forivotal movement connected at one end to said truck frame and operativelyconnected at its other end to said mechanism, and means connecting saidactuating member and said last mentioned member to cause the end of saidlast mentioned said mechato move to positions in different horizontalplanes.

63. ln a mining apparatus, a truck having supporting means,

frame mechanism including actuating the same, and a truck driving memoadjustably mounted on said frame, operative connertions between saidtruck driving member and said supporting means, and means for eifectingadjustment of to said truck frame Without interrupting the operativeconnections beteen the truclr. driving member and truck wheels includingactuating member movable longitudinally of said frame, a pivoted membermovement connected at end to said truck frame and operatively connectedat its other end to said mechanism, means connecting said actuatingmember and said last mentioned member to cause t -e end of said lastmentioned member operatively connected to said mechanism to move topositions in different horizontal planes.

In a mining machine, a portable Wheel supported frame, cutting meansthereon includin a motor mounted on said and means fen from the oppositeends of said motor shaft "or respectively eifecting propulsion of theframe .rough truck. wheel drive at a cutting speed during cutting andatv substantially more rapid moving speed during runningy around 'amine,

both While the motor speed is substantially constant.

65. In a mining machine, a portable frame, cutting means thereonincluding a motor mounted on said frame, and means driven from theopposite ends of said motor shaft for respectively eifecting feed ofsaid frame as a Whole during cutting and feed during running around themine, the means for effecting feed during cutting comprising reversemechanism permitting reversal of feed While the cutting means operatescontinuously in one direction.

66. In a mining machine, a portable frame provided with running gear,cutting means thereon including a mot-or mounted on said frame, andrunning gear `riving means driven from the opposite ends of said motorshaft for respectively eifecting feed of said frame as a Whole duringcutting and feed during running around the mine.

67. In a mining machine, a portable frame provided with running gear,cutting means thereon including a motor mouned on said frame, andrunning gear driving means driven from the opposite ends of said motorshaft for respectively effecting feed of said frame as a Whcleduringcutting and feed duri a running around the mine, the means for effectingfeed during cutting comprising reverse mechanism permitting reversal offeed While the cutting means operates continuously in one direction.

68. fn mining machine, a trucl; f' nc, means for eifecting translationthereof including a truck Wheel, a rotatable driving mei-ber for saidtrucl; Wheel, a plurality of rotatable sproclzet elements constantlyconnected for rotation with said rotatable driving member and adaptedselectively to constitute driving members for the latter, driving meansf r said rotatable elements, and mechanism said elements operative toconnect them in driven relation to said driving means or to permit freerotation thereof.

69. In a mining machine, a truck frame, means for a truck Wheel, arotatable diving member for s id truck Wheel, a plurality of rotatableele-- ments constantly connected for rotation with said rotatabledriving member and adapter.

lectively to constitute driving members for the latter, driving meansfor said rotatable elements rotatable at diiferent predetermined rates,and mechanism between said driving means and seid elements operative toconnect them in driven relation. to said driving means or to permit freerotation thereof.

'70. In a mining machine, a Wheeled truck frame adapted to travel alonga mine tra .i a machine body pivotally mounted on franc for tiltingmovement relative thereto on a transverse asis, a cutter carrying headmounted on said body for rotation about a longitudinal a cutter barpivotally mounted on f .id head for svvin ng movement about anperpendicular to said head airis, a motor carried by said body.mechanism driven by said motor for rotating said head to move said barinto parallel planes and for swinging said bar about its pivot,mechanism driven by said motor for propelling the machine along the minetraclrvvay.

7l. ln a mining machine, a wheeled trucl; frame, a machine bodypivotally mounted on said frame for tilting movement re thereto on atransverse airis, a cutter carrying head mounted on said bcdy forrotation about a longibetween said driving means and eecting translationthereof including bar about its tudinal axis, a cutter bar pivotallymounted on said head for swinging movement about an axis perpendicularto said head axis, a motor carried by said body, and mechanism driven bysaid motor for rotating said head and for swinging said bar about itspivot at a predetermined fast bar positioning speed in one direction andat a predetermined slow cutting speed in the opposite direction.

72. In a mining machine, a wheeled truck frame, a machine body pivotallymounted on said frame for tilting movement relative thereto on atransverse axis, a frame mounted on said body for rotation about alongitudinal axis, a cutter carrying head mounted on said last mentionedframe for rotation about a longitudinal to said frame axis, a cutter barmounted on said head for swinging movement about` an axis perpendicularto said head axis, a motor carried by said body, and mechanism driven bysaid motor for rotating said frame relative to said body, for rotatingsaid head relative to said frame and for swinging said pivot.

73. In a mining machine, a wheeled truck frame adapted to travel along amine trackway, a machine body pivotally mounted on said frame fortilting movement relative thereto on a transverse axis, a cuttercarrying head mounted on said body for rotation about a longitudinalaxis, a cutter bar mounted on said head for swinging movement relativethereto and disposed in a plane oiset from said head axis, a motorcarried by said body, mechanism driven by said motor for rotating saidhead to eiect orbital movement of said bar about said head axis and forswinging said bar about its pivot, andmechanism driven by said motor fordrivingthe truck wheels to propel the machine along they mine trackway.

74.111 a mining head axis, a motor carried by said body, and mechanismdriven by said motor for rotating said rotatable frame, for rotatingsaid head to eiect orbital movement of said cutter bar about said headaxis and for swinging said bar about its pivot.

'75, In a mining machine, a wheeled truck frame, a machine body mountedthereon, a frame mounted on said body for rotation about a longitudinalaxis, a cutter carrying head rotatably mounted on said rotatable framefor rotation about a longitudinal axis parallel to said frame axis, acutter bar pivotally mounted on said head for swinging movement relativethereto, a motor carried by said body, and mechanism driven by saidmotor for simultaneously rotating said rotary frame and said head abouttheir respective axes.

76. In a mining machine, a machine body, a motor carried thereby,cutting machanism including a'cutter bar mounted on said body forswinging movement relative thereto, and mechanism driven by said motorfor effecting swinging movement of said bar selectively at predeterminedfast and slow speeds comprising alternatively operable fast and slowspeed worm gear trains, said bar being swung at one speed through onegear train and at another .peed through the other gear train.

7'?. In a mining machine, a machine body, a motor carried thereby,cutting mechanism including a cutter bar mounted on said body forswinging movement relative thereto, and mechanism driven by said motorfor eiiecting s 'inging movement of said bar at a plurality of pre--determined speeds comprising alternatively eilective fast and slow speedworm gearings and friction lclutch means controlling the connection ofsaid gearings to said motor.

78. In a mining machine, a machine body, a motor carried thereby,cutting mechanism including a cutter bar pivotally mounted on said bodyfor swinging movement relative thereto, and mechanism driven by motorfor eiecting swinging movement of said bar at a plurality ofpredetermined speeds comprising coaxial :tast and slow speed worms, wormgears meshing therewith disposed on parallel axes, driving connectionsbetween said worm gears and said bar, and friction clutch meanscontrolling the connection of said worms to said motor.

79. In a mining machine, a machine body, a motor carried thereby,cutting mechanism comprising a cutter bar pivotally mounted on said bodyfor swinging movement relative thereto, and mechanism driven by saidmotor for eect ing swinging mover. ent of said bar at predetermined lastand slow speeds in opposite directions comprising alternatively operablefast and slow speed worm gear trains, said bar being swung at one speedthrough one gear train and at another speed through the other geartrain.

Si). In a mining machine, a machine body, a motor carried thereby,cutting mechanism comprising a cutter bar pivotally mounted on said bodyfor swinging movement relative thereto, and mechanism driven by saidmotor for eilecting swinging movement of said bar at a plurality ofpredetermined speeds in opposite directions comprising alternativelyeective fast and slow speed worm gearings and friction clutch meanscontrolling the connection of said gearings to said motor.

8l. In a mining machine, a wheeled truck frame, a machine body pivotailymounted on said frame for tilting movement relative thereto on atransverse axis, a motor carried by said body, a cutter carrying headmounted on said body for rotation about a longitudinal mechanism drivenby said motor for effecting rotation or said head, and mechanism drivenby said motor for driving the wheels of said truck frame irrespective ofthe position of said body relative to the truck wheels.

82. In a mining machine, a wheeled truck frame, a machine body pivotaliymounted there-- on for tilting movement relative thereto on a transverseaxis, a motor carried by said body having its power shaft extendinglongitudinally of said body, a cutter carrying head mounted on said bodyfor rotation about a longitudinal axis, mechanism driven from theforward end of said motor for effecting rotation or" said head, andmechanism driven from the rear end of said motor for driving the wheelsof said truck irrespective of the position of said body relative to thetruck wheels.

83. In a mining machine, a wheeled truck frame, a machine body pivotallymounted thereon for tilting movement relative thereto on a li-a.

